Low Temperature Physics, cilt.47, sa.2, ss.106-109, 2021 (SCI-Expanded)
© 2021 Author(s).For the first time, studies of the temperature dependences of the thermoelectric power for various compositions of Bi2Sr2CaxZn1-xCu2O8+y (x = 1; 0.8; 0.4) in the range 77-320 K have been carried out. The obtained experimental results are analyzed within the framework of the Xin's two-band model. The concentration of holes per copper atom and the band gap of the semiconductor type Bi-O layers are determined. It is shown that the replacement of the calcium element with zinc in these proportions does not lead to a change in the electronic band structure of Bi2Sr2CaCu2O8+y.